1. Billions in estimated Medicare Advantage payments from diagnoses reported only on health risk assessments raise concerns Publication: [Washington, D.C.] : U.S. Department of Health and Human Services, Office of Inspector General, September 2020 Subject(s): Fraud -- prevention & controlGovernment RegulationMedicare Part C -- economicsRisk Adjustment -- economicsUnited StatesUnited States. Department of Health and Human Services